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How to remove a broken screw

Left hand drill bits, often simply called “screw extractors” are used to remove a broken or damaged screw that cannot be taken out in the conventional manner using a wrench or screw driver. When the head of a bolt becomes rounded through repeated use or it breaks off...

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DC Power Supplies and Their Usage

Direct current power supplies (DC power supplies) distribute electricity that flows in only one direction (as opposed to alternative current, which flows in both directions) and has either a positive or negative charge. Most commonly, direct current electricity is...

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